Looking beyond lyrics, why is the overall sound of a song like Ariana Grande's "Break Free" so good at turning off our brains, while something like Sam Smith's "Stay With Me" is more conducive to contemplation? Jayson Greene investigates.

Paul Thompson downs a few Mang-o-Ritas and braves overbearing security to file his report from this year's Lollapalooza—featuring a triumphant Chance the Rapper, the continuing dominance of dance music, and, for some reason, Kings of Leon.